Biometric scanners are devices that identify individuals based on unique physical traits. Common examples include fingerprint scanners, facial recognition systems, and iris scanners. These technologies analyze specific features, such as the patterns in a fingerprint or the shape of a face, to verify a person's identity. This makes them useful for security purposes, like unlocking smartphones or accessing secure buildings. These scanners are becoming increasingly popular in various fields, including banking, law enforcement, and healthcare. They offer a convenient and secure way to manage access, reducing the need for passwords or physical keys. As technology advances, biometric scanners are expected to become even more accurate and widely used.